Table 7-2. Atmel AT86RF232 Block Initialization and Settling Time.
Symbol
t XTAL
Parameter
Reference oscillator settling time
Condition
Start XTAL ? clock available at pin
Min.
Typ.
330
Max.
1000
Unit
μs
17 (CLKM). Depends on crystal Q
factor and load capacitor.
t FTN
FTN calibration time
25
μs
t DVREG
DVREG settling time
Depends on external bypass
50
1000
μs
capacitor at DVDD (CB3 = 100nF
nom., 10μF worst case).
t AVREG
AVREG settling time
Depends on external bypass
50
1000
μs
capacitor at AVDD (CB1 = 100nF
nom., 10μF worst case).
t PLL_INIT
Initial PLL settling time
PLL settling time
TRX_OFF ? PLL_ON, including
80
250
μs
50μs AVREG settling time.
t PLL_SW
PLL settling time on channel switch
Duration of channel switch within
11
100
μs
frequency band.
t PLL_CF
t PLL_DCU
t RX_TX
t TX_RX
PLL CF calibration
PLL DCU calibration
RX ? TX
TX ? RX
PLL center frequency calibration.
PLL DCU calibration.
Maximum settling time RX ? TX.
Maximum settling time TX ? RX.
8
24
6
16
32
μs
μs
μs
μs
t SHR_SYNC
t RSSI
SHR, sync
RSSI, update
SHR synchronization period.
RSSI update period in receive
32
96
2
160
μs
μs
states.
t ED
ED measurement
ED measurement period is eight
135
180
μs
symbols.
t CCA
CCA measurement
CCA measurement period is eight
135
180
μs
symbols.
t RND
Random value, update
Random value update period.
1
μs
t AES
AES core cycle time
23.4
24
μs
40
AT86RF232
8321A – MCU Wireless – 10/11
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